Sets the tangent option you want. The option you set determines what types of elements are available.

• Tangent--Specifies that you want two elements tangent. The first element you select can be linear or nonlinear.

• Tangent + Equal Curvature--Specifies that you want two elements tangent and with an equal radius of curvature. The first element you select must be a curve, ellipse or partial ellipse. The elements can be 2D or 3D.

• Parallel Tangent Vectors--Specifies that you want the tangent vectors for the two elements to be parallel. The first element you select must be a curve, ellipse or partial ellipse. The elements can be 2D or 3D.

• Parallel Tangent Vectors + Equal Curvature--Specifies that you want the tangent vectors for the two elements to be parallel and with an equal radius of curvature. The first element you select must be a curve, ellipse or partial ellipse. The elements can be 2D or 3D.